Which one of the following microbes causes acidification and curding o

Which one of the following microbes causes acidification and curding of milk ?

Lactic Acid Bacillus
Clostridium botulinum
Vibrio cholerae
Saccharomyces cerevisiae
This question was previously asked in
UPSC NDA-2 – 2017
Acidification and curding of milk are caused by Lactic Acid Bacillus (or more generally, Lactic Acid Bacteria, LAB). These microbes ferment lactose (milk sugar) into lactic acid, which lowers the pH, causing the milk proteins (casein) to coagulate and curdle.
Lactic Acid Bacteria (LAB), including various species of *Lactobacillus*, *Streptococcus*, and *Lactococcus*, are responsible for the fermentation process that leads to the production of yogurt, cheese, and other fermented milk products.
– *Clostridium botulinum* is a bacterium that produces a potent neurotoxin causing botulism, often associated with improperly canned foods.
– *Vibrio cholerae* is a bacterium that causes cholera, a severe diarrheal disease, typically transmitted through contaminated water.
– *Saccharomyces cerevisiae* is a yeast commonly known as baker’s yeast or brewer’s yeast, used in baking (carbon dioxide production) and alcoholic fermentation.
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